JP3787218B2 - Vehicle rear monitoring device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a vehicle rear monitoring apparatus using a television camera.
[0002]
[Prior art]
In general, a television camera that captures the rear of the vehicle, a television monitor that reproduces video from the television camera, and a plurality of sensors that detect the distance to the obstacle behind the vehicle, from the sensor to the nearest obstacle There is known a vehicle rear-viewing device that displays the distance on the television monitor.
[0003]
[Problems to be solved by the invention]
With this type of conventional vehicle rear monitoring device, the driver can know the distance to the obstacle, but cannot know whether the obstacle is at the rear side of the vehicle, for example, on the left or right side. There is.
[0004]
For example, if it is impossible to know whether the obstacle is located at the left or right position behind the vehicle, it is difficult for the driver to determine which direction the steering wheel should be operated to avoid the obstacle.
[0005]
Accordingly, an object of the present invention is to solve the problems of the conventional technology described above, and to easily know whether the obstacle is in the danger range and whether it is in the left or right direction behind the vehicle. It is to provide a monitoring device.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is a television camera for photographing the rear of a vehicle, a television monitor for reproducing an image from the television camera, and detecting a distance to an obstacle behind the vehicle. In the vehicle rear monitoring device comprising a plurality of sensors, the television monitor includes a display area located at the center in the width direction of the television monitor, and left and right of the rear portion of the vehicle located at the left and right of the display area. consists of a display area corresponding to the sensor provided in the corner, three display areas that displays individually according to a distance a predetermined display form from said plurality of sensors to the obstacle, the sensors each display area corresponds provided in the lower portion of the said television monitor so as to correspond to the position, the change according to the distance of the display form to be displayed on these display areas from a plurality of sensors to the obstacle That the display form changing means is provided, the display form changing means, the television monitor of the display area is between the obstacle in the vehicle rear corner sensor detection region outside a and the center sensor detection area The display form in the display area located in the center in the width direction of the display is changed, and after the obstacle approaches the detection area of the corner sensor, the display in the display area corresponding to the corner sensor that detected the obstacle The form is changed according to the distance from the corner sensor to the obstacle.
[0007]
According to a second aspect of the invention, in those claims 1 Symbol placement, display form changing means is characterized in changing the color of the display form.
[0008]
According to a third aspect of the invention, in those claims 1 Symbol placement, display form changing means is characterized in changing the blinking speed of the display mode.
[0009]
According to a fourth aspect of the invention, in those claims 1 Symbol placement, display form changing means if the obstacle with changing the blinking speed of the display mode enters the danger zone, stops blinking display mode, It is characterized by being lit.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0011]
1A and 1B, reference numeral 1 denotes a vehicle, and a CCD TV camera 3 is attached to the center of the rear of the vehicle 1. A back sonar 7 using ultrasonic waves for detecting the distance to the obstacle is attached to the center of the bumper 5 of the vehicle 1, and corner sonars using ultrasonic waves for detecting the distance to the obstacle are also used in the left and right corners. 8, 9 are attached. The detection range of the central back sonar 7 is represented by symbol A, and the detection ranges of the left and right corner sonars 8 and 9 are represented by symbols B and C.
[0012]
FIG. 2 is a block diagram of the display control unit 100. In FIG. 2, when the shift gear (not shown) of the vehicle is put in the back gear, the backlight 11 is turned on, and a voltage is applied to the IF (interface) circuit 13 of the display control unit 100 through the backlight line 11a. A system-on signal 13 a is input to the control microcomputer 15 through an IF (interface) circuit 13.
[0013]
Next, the camera ON signal 15 a is output from the control microcomputer 15 to the switch 19, and the power from the power supply circuit 17 is supplied to the CCD TV camera 3 connected to the display control unit 100 via the switch 19. At the same time, a signal 15b is output from the control microcomputer 15, and the video switch 21 is turned on by this signal 15b to switch to the camera video.
[0014]
When the video switch 21 is switched, the camera video signal 3a output from the CCD TV camera 3 enters the display control unit 100, passes through the video amplifier 23, and is extracted from the composite separation signal 25a in the sync separation circuit 25. The composite synchronizing signal 25a is input to the on-screen display circuit 27 together with the video signal 23a. In this on-screen display circuit 27, distance markers a to h (FIG. 3) are superimposed on the camera video signal 3a as will be described later, and the signal 27a after the superimposition is a video amplifier 29, a video changeover switch. 21 is output to the television monitor 31.
[0015]
The television monitor 31 is superimposed with the above-described distance markers a to h whose display positions are designated by the control microcomputer 15 as shown in FIG. a and b are about 3 m behind the rear end of the vehicle, c and d are about 2 m behind the rear end of the vehicle, e and f are about 1 m behind the rear end of the vehicle, and g and h are about 50 cm behind the rear end of the vehicle. Show. The display interval at each point indicates the outermost side (vehicle width) of the vehicle 1 as is apparent from FIG.
[0016]
In this embodiment, as shown in FIG. 3, the television monitor 31 has three displays that individually display the distances from the three sonars (“sensors”) 7, 8, 9 to the obstacle according to a predetermined display form. Areas i, j, and k are provided. The predetermined display form here is a display showing the shape of the bumper 5 and is displayed by being divided into three at the left and right corners and the center. The display areas i, j, and k divided into three correspond to a corner sonar 9 attached to the left rear of the vehicle, a back sonar 7 attached to the rear center of the vehicle, and a corner sonar 8 attached to the right rear of the vehicle. Provided.
[0017]
Referring to FIG. 2, the sonars 7, 8, 9 attached to the rear three places (right rear, left rear, center) of the vehicle are connected to the sonar controller 33, and the sonars 7, 8, 9 receive obstacles. The sonar controller 33 converts the signal representing the distance information to the serial signal and passes the IF circuit 13 of the display control unit 100 to the control microcomputer 15. A buzzer 35 is connected to the sonar controller 33, and a warning sound is emitted according to distance information from each of the sonar 7, 8, 9 to the obstacle.
[0018]
When distance information from each sonar 7, 8, 9 is input to the control microcomputer 15, in this embodiment, the display form displayed in each display area i, j, k is changed according to this distance information. . The control microcomputer 15 constitutes display form changing means.
[0019]
5 to 9 show examples of changes in the display form.
[0020]
For example, assume that there is an obstacle S at a position 3 m behind the left side of the vehicle. When the gear of the vehicle 1 is put in the back gear, a camera image is displayed on the television monitor 31 and distance markers a to h are displayed as shown in FIG. In this state, since the obstacle S is far from the left side 3 m of the vehicle, the display form of each display area i, j, k is not changed, and the display color of all areas is, for example, “white”.
[0021]
When the vehicle 1 is moved backward, the vehicle 1 naturally approaches the obstacle S. When the obstacle S approaches the position 2 m behind the vehicle, the central back sonar 7 detects the obstacle S, and the display area j at the center of the bumper changes from “white” to “green” as shown in FIG. To do. If the vehicle is further backed in that state and the detection distance by the back sonar 7 becomes 1 m, the display area j at the center of the bumper changes from “green” to “yellow” as shown in FIG. Since the obstacle S is located at the rear left side of the vehicle, the display of the display area i corresponding to the left corner sonar 9 should be changed to “green” and “yellow”. As is clear from FIG. 4, the detection distance of the corner sonar 9 is set to be shorter than 1 m, so that the obstacle S is detected only by the central back sonar 7 until approaching 1 m.
[0022]
Furthermore, when the vehicle 1 is moved backward and the obstacle S on the left side of the vehicle enters within 1 m, this time, not only the back sonar 7 but also the corner sonar 9 on the left side detects the obstacle S, and the detection distance becomes 0.5 m. As shown in FIG. 8, the display area j in the center of the bumper changes from “yellow” to “red”, and the display of the display area i corresponding to the left corner sonar 9 changes from “white” to “red”. The display in the display area i starts blinking in “red”. This “flashing speed” changes linearly and becomes faster as the vehicle 1 moving backward moves closer to the obstacle S.
[0023]
Finally, when the detection distance by the corner sonar 9 becomes 0.2 m, “flashing” of the display area i is stopped and “red lighting” is performed as shown in FIG. For the driver, it is only necessary to stop the vehicle 1 when it is alerted by “flashing” at the final stage and “lights in red”.
[0024]
According to this embodiment, by changing the display of the display area of the back camera image, it is possible to make the driver more surely recognize the position and presence of the obstacle S behind the vehicle. Also, the sonar 7, 8 and 9 at the left and right center of the vehicle correspond to the center and left and right bumper position indications i, j and k, respectively, so the sonar located at which position detects the obstacle S. You can immediately determine if you are. Further, since the back camera 3 and the back and corner sonars 7, 8, and 9 are used in combination, the blind spot behind the vehicle can be covered more.
[0025]
Bumper position display i, j, k of the distance marker superposed on the screen of the monitor 31 by the distance information from the sonar 7, 8, 9 to the obstacle S obtained in combination with the ultrasonic sonar 7, 8, 9 The display color is changed and blinked, and at the same time, for example, the buzzer 35 is sounded, so that there is an obstacle from both visual and auditory senses, and whether the obstacle is within the danger range (the viewing distance is within 0.2 m in this case) There is an effect that the driver can be notified more accurately of the situation.
[0026]
As mentioned above, although this invention was demonstrated based on one Embodiment, it is clear that this invention is not limited to this.
[0027]
【The invention's effect】
According to the invention of claim 1 Symbol placement, by changing the display of the display area of the back camera images, it is possible to recognize the position, the presence in the more reliably the driver of the vehicle behind the obstacle. Further, if a plurality of sensors are associated with, for example, bumper position displays, it is possible to immediately determine which direction of the sensor is detecting an obstacle, so that safety can be improved.
[0028]
According to invention of Claim 2 , since the color of a display form is changed, it can appeal to a driver | operator's vision and can improve safety | security.
[0029]
According to invention of Claim 3 , since the blinking speed of a display form is changed, it can appeal to a driver | operator's vision and can improve safety | security.
[0030]
According to the invention described in claim 4, when the blinking speed of the display form is changed and the obstacle enters the danger range, the blinking of the display form is stopped and turned on. Can be improved.
[Brief description of the drawings]
FIGS. 1A and 1B are a side view and a plan view showing attachment positions of a camera and a sensor, respectively.
FIG. 2 is a control block diagram.
FIG. 3 is a diagram showing a display form on a monitor.
FIG. 4 is a diagram illustrating a detection range of a camera.
FIG. 5 is a diagram illustrating an example of obstacle detection.
FIG. 6 is a diagram illustrating an example of obstacle detection.
FIG. 7 is a diagram illustrating an example of obstacle detection.
FIG. 8 is a diagram illustrating an example of obstacle detection.
FIG. 9 is a diagram illustrating an example of obstacle detection.
[Explanation of symbols]
1 Vehicle 3 CCD TV Camera 5 Bumper 7, 8, 9 Sensor 15 Control Microcomputer 31 TV Monitor 100 Display Control Units a to h Distance Markers i, j, k Display Area

Claims (4)

In a vehicle rear monitoring device comprising a television camera that captures the rear of the vehicle, a television monitor that reproduces video from the television camera, and a plurality of sensors that detect the distance to the obstacle behind the vehicle,
The TV monitor includes a display area located in the center of the TV monitor in the width direction and display areas corresponding to sensors provided at the left and right corners of the rear of the vehicle. , three display areas that displays individually according to a distance a predetermined display form from said plurality of sensors to an obstacle, disposed below the said television monitor as the display area corresponding to the position of the corresponding sensor, a display form changing means for changing in accordance with the distance to the display form to be displayed on a display area from the plurality of sensors to the obstacle provided,
The display mode changing means is a display located in the center of the display area in the width direction of the television monitor while the obstacle is outside the detection area of the corner sensor at the rear of the vehicle and within the detection area of the central sensor. After the display form in the area is changed and the obstacle approaches the detection area of the corner sensor, the display form in the display area corresponding to the corner sensor that has detected the obstacle is changed from the corner sensor to the obstacle. A vehicle rear monitoring device characterized by being changed according to a distance to an object. The vehicle rear monitoring apparatus according to claim 1, wherein the display form changing unit changes a color of the display form . 2. The vehicle rear monitoring apparatus according to claim 1, wherein the display form changing means changes a blinking speed of the display form . The display form changing means together with the changing the blinking speed of the display mode, if the obstacle enters the danger zone, stops blinking display mode, the vehicle rear of claim 1 Symbol mounting, characterized in that for lighting Monitoring device.

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